As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NLG RED UNSAFE LIGHT REMAINED ILLUMINATED WHEN GEAR WAS EXTENDED FOR LANDING AT DEN. THE GREEN DOWN AND LOCKED LIGHT ILLUMINATED DURING A GO-AROUND AND THE AIRCRAFT LANDED WITHOUT INCIDENT. THE PROXIMITY SENSOR WAS REMOVED AND REPLACED. THE GEAR WAS SWUNG IAW MM 32-60-05, PAGE 201 TO 220 AND OPERATION CHECKED GOOD.